As a result of removing old-style (V2) triggers, V2 user exits have also been removed.
The following user exits, which are hard-coded callbacks to V2 trigger functionality, have been removed. It is now assumed that any calls to these user exits is calling a user-defined user exit rather than a built-in one. Therefore, any code that attempts to locate them is directed to the user exit with the same name in the IAPXTB structure. (IAPXTB is a file that acts as an index to locate each of the user exits that you create at runtime.)
You should recode any code that uses these callbacks to PL/SQL: